Quick Biochemistry - Vitamins (Section 3)

• 1

  What is the cause of subacute combined degeneration of the spinal cord due to a lack of?

  回答

  (B)

  Cobalamin
• 2

  Which vitamin is essential for the process of metabolizing diols, such as the conversion of ethylene glycol?

  回答

  (B)

  Cobalamin
• 3

  Both folic acid and methyl cobalamin (vitamin B₁₂) are necessary for which of the following biochemical reactions?

  回答

  (D)

  Methylation of homocystein to methionine
• 4

  What are the components of folic acid or folate?

  回答

  (C)

  Base pteridine, p-amino benzoic acid and glutamate
• 5

  As a coenzyme, folate plays a role in the transfer and use of what type of molecule?

  回答

  (C)

  Single carbon moiety
• 6

  How is folic acid deficiency often identified through the body?

  回答

  (B)

  Figlu
• 7

  Sulfa drugs interrupt the production of what substance in bacteria?

  回答

  (C)

  Tetrahydrofolate
• 8

  Which type of anemia is associated with folate deficiency?

  回答

  (D)

  Megaloblastic anemia
• 9

  In which environment is thiamin most stable when exposed to heat?

  回答

  (A)

  Acidic medium
• 10

  What conditions are associated with thiamin deficiency?

  回答

  (D)

  All of these
• 11

  Which process necessitates thiamin diphosphate as a component?

  回答

  (A)

  a-Keto acids oxidative decarboxylation
• 12

  What dietary practice can help minimize the loss of thiamin?

  回答

  (D)

  All of the above
• 13

  The recommended daily intake of thiamin is approximately:

  回答

  (B)

  0.5 mg per 1,000 Calories
• 14

  In which group is the demand for thiamin typically higher?

  回答

  (D)

  Both those with alcohol dependency and pregnant women
• 15

  What health condition is most likely to affect individuals whose primary food source is processed rice?

  回答

  (A)

  Beriberi
• 16

  In which environment is riboflavin resistant to heat degradation?

  回答

  (D)

  Both acidic and neutral conditions
• 17

  Which of the following enzymes utilizes FAD as a coenzyme?

  回答

  (D)

  All of these
• 18

  Which of the following conditions can be attributed to a lack of riboflavin?

  回答

  (C)

  Angular stomatitis
• 19

  What nutrient helps to prevent pellagra?

  回答

  (C)

  Niacin
• 20

  Niacin's molecular structure features a:

  回答

  (B)

  Carboxyl functional group
• 21

  Which metabolic process necessitates NADP as a coenzyme?

  回答

  (C)

  Pentose phosphate pathway
• 22

  In which process is NAD essential as a coenzyme?

  回答

  (A)

  Malate conversion
• 23

  In which metabolic pathway/s is NAD utilized as a coenzyme?

  回答

  (D)

  Both Krebs cycle and fatty acid breakdown
• 24

  From which precursor can niacin be produced within the human body?

  回答

  (D)

  Tryptophan
• 25

  What is the recommended daily intake of niacin?

  回答

  (C)

  20 mg
• 26

  Which dietary habit is most frequently associated with niacin deficiency?

  回答

  (C)

  Consumption of maize and/or sorghum
• 27

  In individuals with pellagra, where is dermatitis typically observed?

  回答

  (A)

  Areas exposed to sunlight
• 28

  Which condition can lead to niacin deficiency?

  回答

  (A)

  Hartnup disease
• 29

  Which amino acid is found in pantothenic acid?

  回答

  (C)

  B-Alanine
• 30

  Which component provides the sulphydryl group in coenzyme A?

  回答

  (D)

  Thioethanolamine
• 31

  What type of base is found in Coenzyme A?

  回答

  (A)

  Adenine
• 32

  Which of the following is essential for the creation of coenzyme A?

  回答

  (A)

  ATP
• 33

  Coenzyme A plays a role in breaking down which of these?

  回答

  (D)

  All of these
• 34

  A lack of pantothenic acid can impact which of the following in humans?

  回答

  (C)

  Both (A) and (B)
• 35

  Which enzyme uses Pyridoxal phosphate as a coenzyme?

  回答

  (D)

  All of these
• 36

  In which process is Pyridoxal phosphate needed as a coenzyme?

  回答

  (D)

  All of these
• 37

  Pyridoxal phosphate is a necessary coenzyme for which enzyme?

  回答

  (B)

  Phosphorylase
• 38

  How can a lack of Pyridoxine be identified by examining urine?

  回答

  (C)

  Xanthurenic acid
• 39

  What substance is given to help diagnose Pyridoxine deficiency by measuring xanthurenic acid in urine?

  回答

  (C)

  Tryptophan
• 40

  The amount of Pyridoxine needed depends on how much of which substance is consumed?

  回答

  (B)

  Proteins
• 41

  Which of the following is known to counteract the effects of egg white consumption?

  回答

  (B)

  Biton
• 42

  What happens to avidin and biotin when eggs undergo heat treatment?

  回答

  (B)

  Avidin is inactivated but biotin remains unaffected
• 43

  Which type of enzyme utilizes biotin as a necessary component?

  回答

  (D)

  Carboxylases
• 44

  Biotin plays a crucial role in the function of which enzyme(s)?

  回答

  (D)

  All of these
• 45

  Which of the following enzymes requires lipoic acid as a coenzyme?

  回答

  (C)

  Both (A) and (B)
• 46

  In terms of its chemical composition, what is lipoic acid classified as?

  回答

  (D)

  Sulphur containing fatty acid
• 47

  What are the key components of the molecule known as folic acid?

  回答

  (D)

  All of these
• 48

  What molecule is essential for the transformation of folate into tetrahydrofolate?

  回答

  (B)

  NADPH
• 49

  What are the observable effects of a riboflavin deficiency?

  回答

  (D)

  Both (A) and (B)
• 50

  Vitamin B12 is the precursor for what type of coenzymes?

  回答

  (A)

  Cobamide